Sorry I lost track of this thread. If it's a Sirius add on radio like I had years ago when I drove truck, you may need to have your car radio set to a specific station to hear the Sirius broadcast. There were several stations available so you could find one if the one you were using was broadcasting in your area. Even then you had to get the number off of the Sirius radio and subscribe to Sirius or you could not hear anything other than their preview broadcast. It also needed a small, about one inch square, magnetic antenna that you stuck to the roof of a metal vehicle of laid it on the dash.
Toim